Cline AI is an open-source, free AI programming assistant plugin, primarily integrated with Visual Studio Code, designed to help developers with coding, analysis, and automation tasks by understanding the codebase context.
The plugin itself is free to use; users pay for API usage of the AI models they choose, with some model providers offering free quotas.
Supports code generation and analysis for major languages including Python, JavaScript, Java, C++, Go, HTML, and CSS.
As an open-source tool, its code is auditable; most operations run locally, and file changes or terminal commands require user authorization. Code and data are by default not uploaded to external servers.
Supports switching between multiple mainstream large language models, such as Claude series, Google Gemini, DeepSeek, Zhipu GLM, Qwen3 Coder, etc., depending on user configuration.
It offers a dual-mode of Plan and Execute. The Plan mode decomposes requirements and designs an implementation plan; the Execute mode performs the actual coding and file operations based on the approved plan.
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